Aaron was the brother of Moses
and high priest of the Israelites, charged with offering
intercessory sacrifices on their behalf. In the
latter function, he was taken in Christian typology to be
a type of Christ.

In the statue at left Aaron is dressed
as prescribed in Exodus
28 (cached):
the breastplate with 12 stones, secured by gold
chains and worn over the ephod, and the mitre with
the gold plate and Hebrew inscription declaring
"Holiness to the Lord."

One thing he does not wear here is the "holy crown"
of Exodus
29:6 (cached).
In other art, that crown has a pair of high horns
that curve in toward each other (example).

In the statue shown at left, the vessel with the
flame at Aaron's left foot should be the censer for
the incense offering prescribed in Exodus
30:6-9 (cached).
Also see Numbers
16:46: "Moses said to Aaron: Take the censer, and putting fire in it from
the altar, put incense upon it, and go quickly to the
people to pray for them: for already wrath is gone out
from the Lord, and the plague rageth."
Typologically, this intercessory role relates to
Christ's reconciliation of mankind with the Father.
For example, an 11th-century portable
altar bears
several images of intercessory sacrifices that
anticipate that of Christ and, by extension, that of
the Christian liturgy. In one of the images on the
altar we see Aaron wielding his censer and wearing
his "holy crown."